Return-Path: Received: (qmail 10400 invoked from network); 14 Nov 2002 18:20:57 -0000 Received: from murphys.services.quay.plus.net (212.159.14.225) by mailstore with SMTP; 14 Nov 2002 18:20:57 -0000 Received: (qmail 26122 invoked from network); 14 Nov 2002 18:20:19 -0000 Received: from post.thorcom.com (193.82.116.70) by murphys.services.quay.plus.net with SMTP; 14 Nov 2002 18:20:19 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.10) id 18CORK-0002fw-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 14 Nov 2002 18:10:06 +0000 Received: from [194.73.73.147] (helo=einsteinium) by post.thorcom.com with esmtp (Exim 4.10) id 18CORK-0002fn-00 for rsgb_lf_group@blacksheep.org; Thu, 14 Nov 2002 18:10:06 +0000 Received: from host213-122-119-184.in-addr.btopenworld.com ([213.122.119.184] helo=main) by einsteinium with smtp (Exim 3.22 #15) id 18CORJ-0005VI-00 for rsgb_lf_group@blacksheep.org; Thu, 14 Nov 2002 18:10:05 +0000 Message-ID: <000201c28c08$e9aab120$b8777ad5@main> From: "Alan Melia" To: "LF-Group" Date: Thu, 14 Nov 2002 15:26:08 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: LF skywave Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=0.7 required=5.0tests=SPAM_PHRASE_01_02,USER_AGENT_OEversion=2.42 Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Hi Jay, I dont think you need worry about angling signal upwards for skywave. It will only exceed groundwave strength at greater than about 600 to 700kms according to the meaurements I have seen. The steeper it goes, the deeper it goes (into the D-layer) and the more absorption it suffers. Hence no skip zone on LF. I think this distance is fairly indepenent of power level. If you concentrate on getting good strength on the ground about a mile away from the aerial, you cant go far wrong. Cheers de Alan G3NYK alan.melia@btinternet.com http://www.alan.melia.btinternet.co.uk